cut, and in which the remaining sawlog-size timber contains 

 at least 600 board feet per acre. 



Second-growth sawlog-size partly cut. — Second-growth stands 

 from which 10 percent or more of the sawlog-size trees have 

 been cut, but in which the remaining sawlog-size timber 

 contains at least 400 board feet per acre. 



Second-growth under-sawlog-size. — Second-growth stands com- 

 posed predominantly of under-sawlog-size trees at least 1 

 inch d. b. h. In uncut stands the sawlog-size timber present 

 contains less than 600 board feet per acre. In partly cut 

 stands there is less than 400 board feet per acre of sawlog-size 

 timber. 



Reproduction. — Areas not falling into any of the other classi- 

 fications and bearing per acre more than 80 seedlings less 

 than 1 inch in diameter. 



Clear-cut. — Cut-over areas on which insufficient young 

 growth has come in to classify as either second growth or 

 reproduction. 



Turpentine Tree Conditions 



Round. — Longleaf and slash pine trees that have never been 

 worked for naval stores. 



Working. — Longleaf and slash pine trees that are now being 

 worked for naval stores. 



Front-faced {or front-cupped) . — Longleaf and slash pine trees 

 on which a first face is now being worked. 



Back-faced (or back-cupped). — Longleaf and slash pine trees 

 on which at least one turpentine face has already been 

 worked and on which a back (second or third, etc.) face is 

 now being worked. 



Resting. — Previously worked longleaf and slash pine trees 

 that are now resting prior to the working of back faces. 



Worked-out. — Longleaf and slash pine trees on which as 

 many faces have been worked as the trees will stand. These 

 trees have served their purpose in the production of naval 

 stores and are now available for other uses. 



Species Groups 



Hardwoods. — Pulping: Red gum, black gum, bay, soft 

 maple, magnolia, and associated minor species. Nonpulp- , 

 ing: Red oaks, white oaks, ash, elm, hickory, holly, 1 per- 

 simmon, 1 and associated minor species. 



Cypress. — Cypress only. 



Tree Classes 



Good tree. — Any sawlog-size tree that is, or an under sawlog- 

 size tree that gives promise of becoming, a saw-timber tree. 



Sawlog-size tree. — A tree with the following minimum di- 

 ameter outside of bark: Hardwood, 13inchesat A)A feet above 

 ground; cypress, 9 inches at 2J-2 feet above the butt swell; all 

 pine except turpentined longleaf and slash pine, 9 inches at 

 4y 2 feet above ground; turpentined longleaf and slash pine, 

 9 inches at 10 feet above ground. 



Saw-timber tree. — A sawlog-size tree 50-percent sound, that 

 would produce at least one 12-foot usable log. 



Sound cull tree. — A sawlog-size tree that is not a saw-timber 

 tree, owing to form, crook, knots, extreme limbiness, or other 

 similar defects; or an under-sawlog-size tree that will not 

 become a saw-timber tree for similar reasons. 



Rotten cull tree. — A sawlog-size tree less than 50-pcrcent 

 sound; or an under-sawlog-size tree sufficiently unsound to 

 indicate the likelihood of its future loss from the stand. 



Log Rules 



Doyle log rule. — The formula for a 16-foot log was used: 

 V=(D- A)\ 



Scribner log rule. — The formula for a 16-foot log, with allow- 

 ance for a %-inch saw kerf, was used: V=0.79D 2 — 2D — 4. 

 This formula was derived by Donald Bruce and Francis X. 

 Schumacher from the values of the original Scribner log rule. 



International log rule. — The formula for a 4-foot log, with 

 allowances for a J4-inch saw kerf and J4 6 -inch shrinkage was 

 used: V= (0.22£fi-0.T[D) 0.904762. 



Pines. — Turpentine: Longleaf and slash pines. Nontur- 

 pentine: Loblolly, shortlcaf, pond, sand, and spruce pines. 



1 Since holly and persimmon are used primarily for special 

 purposes, such as bobbins, shuttles, and handles of sporting 

 goods, they were not included in the saw-timber estimate. 



